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Description

The Hammas Calendar plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'apix' parameter in the 'hp-calendar-manage-redirect' shortcode in all versions up to, and including, 1.5.11 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with Contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

PUBLISHED Reserved 2026-02-04 | Published 2026-03-07 | Updated 2026-03-07 | Assigner Wordfence




MEDIUM: 6.4CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

Problem types

CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Product status

Default status
unaffected

* (semver)
affected

Timeline

2026-03-02:Vendor Notified
2026-03-06:Disclosed

Credits

Djaidja Moundjid finder

References

www.wordfence.com/...-988a-4cb6-bf20-51878a5b1555?source=cve

plugins.trac.wordpress.org/...ar/tags/1.5.11/hp-calendar.php

plugins.trac.wordpress.org/...r/tags/1.5.11/src/HpPlugin.php

plugins.trac.wordpress.org/...calendar&sfp_email=&sfph_mail=

cve.org (CVE-2026-1902)

nvd.nist.gov (CVE-2026-1902)

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